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Cpvc Breech

Anyone know of a PVC that fits CPVC?

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#1 OfAllTheNerf

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Posted 12 November 2007 - 07:33 PM

Hey guys

I want to make a CPVC breech for a.... gun. Yeah, let's leave it at that.

Basically, I want to know if anyone knows of any tubing that fits over CPVC, creating a perfect seal.

I heard something about copper, but anyone have any idea what type or size?


So, as the title states, is there a type of thinwall PVC that fits in a 1/2" PVC coupler but can also nest CPVC (and a at2k pump shaft/ copper) in it?

Thanks,

-OfAll'

*editted*

Edited by OfAllTheNerf, 12 November 2007 - 08:33 PM.

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#2 blister

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Posted 12 November 2007 - 07:37 PM

An at2k pump tube works nicely, as well as a no-stop 1/2 copper repair pipe.
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#3 OfAllTheNerf

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Posted 12 November 2007 - 08:31 PM

An at2k pump tube works nicely, as well as a no-stop 1/2 copper repair pipe.


Thank you.

One question, what exactly does "no-stop" mean? WIll they know if I ask at the store?
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#4 TheVeg

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Posted 12 November 2007 - 10:21 PM

If you get Charlotte 1/2" PVC (I found it at Lowes in a kind of small piece size, not the ten ft. lengths) it is big enough for cpvc to fit in very snugly, and airtight. All of the brands of cpvc I have work with it but the 1/2" must be charlotte. Copper also fits into this PVC airtight.
-Veg
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#5 blister

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Posted 12 November 2007 - 10:58 PM

An at2k pump tube works nicely, as well as a no-stop 1/2 copper repair pipe.


Thank you.

One question, what exactly does "no-stop" mean? WIll they know if I ask at the store?


"No-stop" is a little hard to explain, but imagine a copper coupler without the little line in the middle that separates the two pipes. It is about 3" long and costs about $5. Yea, it's a rip, but it's airtight. I'm unsure of how well it will work for a breech, but it does seal over the CPVC.
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#6 LOMHawkeye

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Posted 13 November 2007 - 01:56 AM

I developed a breech that uses craft foam.
3M clan website > mods > breech
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#7 rupus77

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Posted 28 July 2010 - 02:44 PM

I found 1/2 sch. 20 pvc works just fine that and it s found at most hardware stores theres about a half a millimeter between the OD of the cpvc and the ID of the pvc.

Edited by rupus77, 28 July 2010 - 02:46 PM.

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#8 The one donut

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Posted 28 July 2010 - 10:58 PM

I developed a breech that uses craft foam.
3M clan website > mods > breech


Isn't that like the breech in the homemades section?
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#9 taerKitty

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Posted 29 July 2010 - 12:48 PM

I found 1/2 sch. 20 pvc works just fine that and it s found at most hardware stores theres about a half a millimeter between the OD of the cpvc and the ID of the pvc.


I've found that the 1/2mm difference is going the wrong way - the OD of the CPVC is 1/2mm greater than the ID of the PVC. Nothing that a bit of loving percussive maintenance won't fix, but not suitable for a breech.

Yes, I'm using Charlotte.
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